“Parcel tracking IDs, patents, and other specialized numbers can be entered into Google’s search box for quick access to information about them,” according to the Google Web Search Features page, www.google.com/help/features.html.
Special searches by number types include:

When you don’t find what you’re seeking, consider specifying more precisely what you want by using Google’s Advanced Search feature. Don’t be frightened by the name “Advanced Search”; it’s easy to use, and it allows you to select or exclude pages with more precision than Google’s standard search box. Click on the Advanced Search link […]